<?php
$username = "Austin Leath -_#";
$username_err = "no error";
if(preg_match('/[^a-z_\-0-9]/i', $string)) {
  $username_err = "Username can only contain alphanumeric characters, dashes, and underscores.";
}

echo $username_err
?>

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');

// this cycle echoes all associative array
// key where value equals "apple"
while ($fruit_name = current($array)) {
    if ($fruit_name == 'apple') {
        echo key($array), "\n";
    }
    next($array);
}
?>

<?php
function modegetter($language) {
  switch ($language) {
    case 'ABC':
      echo  "abc";
      break;
    case 'ActionScript':
      echo  "actionscript";
      break;
    case 'ADA':
      echo  "ada";
      break;
    case 'Alda':
      echo  "alda";
      break;
    case 'Apache Conf':
      echo  "apache_conf";
      break;
    case 'Apex':
      echo  "apex";
      break;
    case 'AQL':
      echo  "aql";
      break;
    case 'AsciiDoc':
      echo  "asciidoc";
      break;
    case 'ASL':
      echo  "asl";
      break;
    case 'Assembly x86':
      echo  "assembly_x86";
      break;
    case 'AutoHotkey / AutoIt':
      echo  "autohotkey";
      break;
    case 'BatchFile':
      echo  "batchfile";
      break;
    case 'C':
      echo  "c_cpp";
      break;
    case 'C++':
      echo  "c_cpp";
      break;
    case 'C9Search':
      echo  "c9search";
      break;
    case 'Cirru':
      echo  "cirru";
      break;
    case 'Clojure':
      echo  "clojure";
      break;
    case 'Cobol':
      echo  "cobol";
      break;
    case 'CoffeeScript':
      echo  "coffee";
      break;
    case 'ColdFusion':
      echo  "coldfusion";
      break;
    case 'Crystal':
      echo  "crystal";
      break;
    case 'C#':
      echo  "csharp";
      break;
    case 'Csound Document':
      echo  "csound_document";
      break;
    case 'Csound':
      echo  "csound_orchestra";
      break;
    case 'Csound Score':
      echo  "csound_score";
      break;
    case 'CSS':
      echo  "css";
      break;
    case 'Curly':
      echo  "curly";
      break;
    case 'D':
      echo  "d";
      break;
    case 'Dart':
      echo  "dart";
      break;
    case 'Diff':
      echo  "diff";
      break;
    case 'Dockerfile':
      echo  "dockerfile";
      break;
    case 'Dot':
      echo  "dot";
      break;
    case 'Drools':
      echo  "drools";
      break;
    case 'Edifact':
      echo  "edifact";
      break;
    case 'Eiffel':
      echo  "eiffel";
      break;
    case 'EJS':
      echo  "ejs";
      break;
    case 'Elixir':
      echo  "elixir";
      break;
    case 'Elm':
      echo  "elm";
      break;
    case 'Erlang':
      echo  "erlang";
      break;
    case 'Forth':
      echo  "forth";
      break;
    case 'Fortran':
      echo  "fortran";
      break;
    case 'FSharp':
      echo  "fsharp";
      break;
    case 'FSL':
      echo  "fsl";
      break;
    case 'FreeMarker':
      echo  "ftl";
      break;
    case 'Gcode':
      echo  "gcode";
      break;
    case 'Gherkin':
      echo  "gherkin";
      break;
    case 'Gitignore':
      echo  "gitignore";
      break;
    case 'Glsl':
      echo  "glsl";
      break;
    case 'Gobstones':
      echo  "gobstones";
      break;
    case 'Go':
      echo  "golang";
      break;
    case 'GraphQLSchema':
      echo  "graphqlschema";
      break;
    case 'Groovy':
      echo  "groovy";
      break;
    case 'HAML':
      echo  "haml";
      break;
    case 'Handlebars':
      echo  "handlebars";
      break;
    case 'Haskell':
      echo  "haskell";
      break;
    case 'Haskell Cabal':
      echo  "haskell_cabal";
      break;
    case 'haXe':
      echo  "haxe";
      break;
    case 'Hjson':
      echo  "hjson";
      break;
    case 'HTML':
      echo  "html";
      break;
    case 'HTML (Elixir)':
      echo  "html_elixir";
      break;
    case 'HTML (Ruby)':
      echo  "html_ruby";
      break;
    case 'INI':
      echo  "ini";
      break;
    case 'Io':
      echo  "io";
      break;
    case 'Jack':
      echo  "jack";
      break;
    case 'Jade':
      echo  "jade";
      break;
    case 'Java':
      echo  "java";
      break;
    case 'JavaScript':
      echo  "javascript";
      break;
    case 'JSON':
      echo  "json";
      break;
    case 'JSON5':
      echo  "json5";
      break;
    case 'JSONiq':
      echo  "jsoniq";
      break;
    case 'JSP':
      echo  "jsp";
      break;
    case 'JSSM':
      echo  "jssm";
      break;
    case 'JSX':
      echo  "jsx";
      break;
    case 'Julia':
      echo  "julia";
      break;
    case 'Kotlin':
      echo  "kotlin";
      break;
    case 'LaTeX':
      echo  "latex";
      break;
    case 'Latte':
      echo  "latte";
      break;
    case 'LESS':
      echo  "less";
      break;
    case 'Liquid':
      echo  "liquid";
      break;
    case 'Lisp':
      echo  "lisp";
      break;
    case 'LiveScript':
      echo  "livescript";
      break;
    case 'LogiQL':
      echo  "logiql";
      break;
    case 'LSL':
      echo  "lsl";
      break;
    case 'Lua':
      echo  "lua";
      break;
    case 'LuaPage':
      echo  "luapage";
      break;
    case 'Lucene':
      echo  "lucene";
      break;
    case 'Makefile':
      echo  "makefile";
      break;
    case 'Markdown':
      echo  "markdown";
      break;
    case 'Mask':
      echo  "mask";
      break;
    case 'MATLAB':
      echo  "matlab";
      break;
    case 'Maze':
      echo  "maze";
      break;
    case 'MediaWiki':
      echo  "mediawiki";
      break;
    case 'MEL':
      echo  "mel";
      break;
    case 'MIPS':
      echo  "mips";
      break;
    case 'MIXAL':
      echo  "mixal";
      break;
    case 'MUSHCode':
      echo  "mushcode";
      break;
    case 'MySQL':
      echo  "mysql";
      break;
    case 'Nginx':
      echo  "nginx";
      break;
    case 'Nim':
      echo  "nim";
      break;
    case 'Nix':
      echo  "nix";
      break;
    case 'NSIS':
      echo  "nsis";
      break;
    case 'Nunjucks':
      echo  "nunjucks";
      break;
    case 'Objective-C':
      echo  "objectivec";
      break;
    case 'OCaml':
      echo  "ocaml";
      break;
    case 'Pascal':
      echo  "pascal";
      break;
    case 'Perl':
      echo  "perl";
      break;
    case 'pgSQL':
      echo  "pgsql";
      break;
    case 'PHP':
      echo  "php";
      break;
    case 'PHP (Blade Template':
      echo  "php_laravel_blade";
      break;
    case 'Pig':
      echo  "pig";
      break;
    case 'Powershell':
      echo  "powershell";
      break;
    case 'Praat':
      echo  "praat";
      break;
    case 'Prisma':
      echo  "prisma";
      break;
    case 'Prolog':
      echo  "prolog";
      break;
    case 'Properties':
      echo  "properties";
      break;
    case 'Protobuf':
      echo  "protobuf";
      break;
    case 'Puppet':
      echo  "puppet";
      break;
    case 'Python':
      echo  "python";
      break;
    case 'QML':
      echo  "qml";
      break;
    case 'R':
      echo  "r";
      break;
    case 'Raku':
      echo  "raku";
      break;
    case 'Razor':
      echo  "razor";
      break;
    case 'RDoc':
      echo  "rdoc";
      break;
    case 'Red':
      echo  "red";
      break;
    case 'RHTML':
      echo  "rhtml";
      break;
    case 'RST':
      echo  "rst";
      break;
    case 'Ruby':
      echo  "ruby";
      break;
    case 'Rust':
      echo  "rust";
      break;
    case 'SASS':
      echo  "sass";
      break;
    case 'SCAD':
      echo  "scad";
      break;
    case 'Scala':
      echo  "scala";
      break;
    case 'Scheme':
      echo  "scheme";
      break;
    case 'SCSS':
      echo  "scss";
      break;
    case 'Bash':
      echo  "sh";
      break;
    case 'SJS':
      echo  "sjs";
      break;
    case 'Slim':
      echo  "slim";
      break;
    case 'Smarty':
      echo  "smarty";
      break;
    case 'Smithy':
      echo  "smithy";
      break;
    case 'Snippets':
      echo  "snippets";
      break;
    case 'Soy Template':
      echo  "soy_template";
      break;
    case 'Space':
      echo  "space";
      break;
    case 'SQL':
      echo  "sql";
      break;
    case 'SQLServer':
      echo  "sqlserver";
      break;
    case 'Stylus':
      echo  "stylus";
      break;
    case 'SVG':
      echo  "svg";
      break;
    case 'Swift':
      echo  "swift";
      break;
    case 'Tcl':
      echo  "tcl";
      break;
    case 'Terraform':
      echo  "terraform";
      break;
    case 'Tex':
      echo  "tex";
      break;
    case 'Text':
      echo  "text";
      break;
    case 'Textile':
      echo  "textile";
      break;
    case 'Toml':
      echo  "toml";
      break;
    case 'TSX':
      echo  "tsx";
      break;
    case 'Twig':
      echo  "twig";
      break;
    case 'Typescript':
      echo  "typescript";
      break;
    case 'Vala':
      echo  "vala";
      break;
    case 'VBScript':
      echo  "vbscript";
      break;
    case 'Velocity':
      echo  "velocity";
      break;
    case 'Verilog':
      echo  "verilog";
      break;
    case 'VHDL':
      echo  "vhdl";
      break;
    case 'Visualforce':
      echo  "visualforce";
      break;
    case 'Wollok':
      echo  "wollok";
      break;
    case 'XML':
      echo  "xml";
      break;
    case 'XQuery':
      echo  "xquery";
      break;
    case 'YAML':
      echo  "yaml";
      break;
    case 'Zeek':
      echo  "zeek";
      break;
    case 'Django':
      echo  "django";
      break;
    default:
      echo  "text";
      break;
  }
}
?>

<?php
echo '
<select id="modeEl" size="1">
   <option value="abap">ABAP</option>
   <option value="abc">ABC</option>
   <option value="actionscript">ActionScript</option>
   <option value="ada">ADA</option>
   <option value="alda">Alda</option>
   <option value="apache_conf">Apache Conf</option>
   <option value="apex">Apex</option>
   <option value="aql">AQL</option>
   <option value="asciidoc">AsciiDoc</option>
   <option value="asl">ASL</option>
   <option value="assembly_x86">Assembly x86</option>
   <option value="autohotkey">AutoHotkey / AutoIt</option>
   <option value="batchfile">BatchFile</option>
   <option value="c_cpp">C and C++</option>
   <option value="c9search">C9Search</option>
   <option value="cirru">Cirru</option>
   <option value="clojure">Clojure</option>
   <option value="cobol">Cobol</option>
   <option value="coffee">CoffeeScript</option>
   <option value="coldfusion">ColdFusion</option>
   <option value="crystal">Crystal</option>
   <option value="csharp">C#</option>
   <option value="csound_document">Csound Document</option>
   <option value="csound_orchestra">Csound</option>
   <option value="csound_score">Csound Score</option>
   <option value="css">CSS</option>
   <option value="curly">Curly</option>
   <option value="d">D</option>
   <option value="dart">Dart</option>
   <option value="diff">Diff</option>
   <option value="dockerfile">Dockerfile</option>
   <option value="dot">Dot</option>
   <option value="drools">Drools</option>
   <option value="edifact">Edifact</option>
   <option value="eiffel">Eiffel</option>
   <option value="ejs">EJS</option>
   <option value="elixir">Elixir</option>
   <option value="elm">Elm</option>
   <option value="erlang">Erlang</option>
   <option value="forth">Forth</option>
   <option value="fortran">Fortran</option>
   <option value="fsharp">FSharp</option>
   <option value="fsl">FSL</option>
   <option value="ftl">FreeMarker</option>
   <option value="gcode">Gcode</option>
   <option value="gherkin">Gherkin</option>
   <option value="gitignore">Gitignore</option>
   <option value="glsl">Glsl</option>
   <option value="gobstones">Gobstones</option>
   <option value="golang">Go</option>
   <option value="graphqlschema">GraphQLSchema</option>
   <option value="groovy">Groovy</option>
   <option value="haml">HAML</option>
   <option value="handlebars">Handlebars</option>
   <option value="haskell">Haskell</option>
   <option value="haskell_cabal">Haskell Cabal</option>
   <option value="haxe">haXe</option>
   <option value="hjson">Hjson</option>
   <option value="html">HTML</option>
   <option value="html_elixir">HTML (Elixir)</option>
   <option value="html_ruby">HTML (Ruby)</option>
   <option value="ini">INI</option>
   <option value="io">Io</option>
   <option value="jack">Jack</option>
   <option value="jade">Jade</option>
   <option value="java">Java</option>
   <option value="javascript">JavaScript</option>
   <option value="json">JSON</option>
   <option value="json5">JSON5</option>
   <option value="jsoniq">JSONiq</option>
   <option value="jsp">JSP</option>
   <option value="jssm">JSSM</option>
   <option value="jsx">JSX</option>
   <option value="julia">Julia</option>
   <option value="kotlin">Kotlin</option>
   <option value="latex">LaTeX</option>
   <option value="latte">Latte</option>
   <option value="less">LESS</option>
   <option value="liquid">Liquid</option>
   <option value="lisp">Lisp</option>
   <option value="livescript">LiveScript</option>
   <option value="logiql">LogiQL</option>
   <option value="lsl">LSL</option>
   <option value="lua">Lua</option>
   <option value="luapage">LuaPage</option>
   <option value="lucene">Lucene</option>
   <option value="makefile">Makefile</option>
   <option value="markdown">Markdown</option>
   <option value="mask">Mask</option>
   <option value="matlab">MATLAB</option>
   <option value="maze">Maze</option>
   <option value="mediawiki">MediaWiki</option>
   <option value="mel">MEL</option>
   <option value="mips">MIPS</option>
   <option value="mixal">MIXAL</option>
   <option value="mushcode">MUSHCode</option>
   <option value="mysql">MySQL</option>
   <option value="nginx">Nginx</option>
   <option value="nim">Nim</option>
   <option value="nix">Nix</option>
   <option value="nsis">NSIS</option>
   <option value="nunjucks">Nunjucks</option>
   <option value="objectivec">Objective-C</option>
   <option value="ocaml">OCaml</option>
   <option value="pascal">Pascal</option>
   <option value="perl">Perl</option>
   <option value="pgsql">pgSQL</option>
   <option value="php">PHP</option>
   <option value="php_laravel_blade">PHP (Blade Template)</option>
   <option value="pig">Pig</option>
   <option value="powershell">Powershell</option>
   <option value="praat">Praat</option>
   <option value="prisma">Prisma</option>
   <option value="prolog">Prolog</option>
   <option value="properties">Properties</option>
   <option value="protobuf">Protobuf</option>
   <option value="puppet">Puppet</option>
   <option value="python">Python</option>
   <option value="qml">QML</option>
   <option value="r">R</option>
   <option value="raku">Raku</option>
   <option value="razor">Razor</option>
   <option value="rdoc">RDoc</option>
   <option value="red">Red</option>
   <option value="rhtml">RHTML</option>
   <option value="rst">RST</option>
   <option value="ruby">Ruby</option>
   <option value="rust">Rust</option>
   <option value="sass">SASS</option>
   <option value="scad">SCAD</option>
   <option value="scala">Scala</option>
   <option value="scheme">Scheme</option>
   <option value="scss">SCSS</option>
   <option value="sh">SH</option>
   <option value="sjs">SJS</option>
   <option value="slim">Slim</option>
   <option value="smarty">Smarty</option>
   <option value="smithy">Smithy</option>
   <option value="snippets">snippets</option>
   <option value="soy_template">Soy Template</option>
   <option value="space">Space</option>
   <option value="sql">SQL</option>
   <option value="sqlserver">SQLServer</option>
   <option value="stylus">Stylus</option>
   <option value="svg">SVG</option>
   <option value="swift">Swift</option>
   <option value="tcl">Tcl</option>
   <option value="terraform">Terraform</option>
   <option value="tex">Tex</option>
   <option value="text">Text</option>
   <option value="textile">Textile</option>
   <option value="toml">Toml</option>
   <option value="tsx">TSX</option>
   <option value="twig">Twig</option>
   <option value="typescript">Typescript</option>
   <option value="vala">Vala</option>
   <option value="vbscript">VBScript</option>
   <option value="velocity">Velocity</option>
   <option value="verilog">Verilog</option>
   <option value="vhdl">VHDL</option>
   <option value="visualforce">Visualforce</option>
   <option value="wollok">Wollok</option>
   <option value="xml">XML</option>
   <option value="xquery">XQuery</option>
   <option value="yaml">YAML</option>
   <option value="zeek">Zeek</option>
   <option value="django">Django</option>
</select>
';
?>

<?php
$listOfFiles = glob("*.{jpg,png,gif,tiff,jpeg}", GLOB_BRACE);

echo 'images = []; ';

for($x = 0; $x <= count($listOfFiles)-1; $x++) {
	echo "images[" . $x . "] =" . '"' . $listOfFiles[$x] . '"' . "; ";
}
?>

<?php
function getFileExtension($file) {
    return end(explode(".", $file));
}
?>